miehle



2 Sheets-Sheet 1.

(No Model.)

R. MIEHLE. PAPER CUTTING MACHINE.

Patented May 14, 1895'.

(No Model.) 7 2 Sheets-Sheet 2.

' R. MIEHLIL,

PAPER. GUTTI-NG MACHINE.

Patented May 14, 1895.

Not 539,071.

NITED STATES ROBERT MIEHLE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THESHNIEDEWEND & LEE COMPANY, OF SAME PLACE.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent. No. 539,071, dated May 14,1895. Application filed January 25,1893. Serial No. 459,735.iNc'niodel.)

To 00 whom/it may concern..-

Be it known that I, ROBERT MIEHLE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Paper-Cutting Machines,of which the following is a full, clear, and exact specification.

My invention relates to that class of paper cutting machines in whichthe power for actuating the knife is derived from a continually rotatingshaft having detachable clutch connection with the knife-operatingmechanism, and which clutch is adapted to be disengaged by an automaticthrow-9E or stop mechanism at the conclusion of each operation or returnmovement of the knife; and it has more especial reference to a machinein which the driving shaft is arranged transversely of the plane ofaction of the knife.

My invention is designed to overcome the difficulty experienced by themoving lug of the stop mechanism or throw-off hanging on the throw-offlever or trip after the clutchmembers are fully disengaged and themachine rendered inactive, thus necessitating starting the machine byhand before the clutch-members can be again brought into engagement andthe machine thrown into positive operation.

It also has reference to means for preventing the clutch members fromremaining so close together after disengagement that through slightjarring of the machine and from other causes they will again worktogether, which re-engagement in some instances is justsufficient tocause damage to their teeth, while at other times the members come intosubstantial engagement and set the machine into operation; thus not onlydamaging the mechanism, but endangering the operator and often spoilingthe material.

Part of my improvements, therefore, relate to the stop mechanism orthrow-0E, and hence one of the important objects of my invention is toprovide improved means for causing the moving lug of the stop mechanismor throwoff and the trip or throw-off lever to continue to move withrelation to each other after coming into engagement, until they havefully disengaged.

More specifically speaking, the object of my invention in this respectis to provide improved means for causing the moving lug of the stopmechanism or throwoff ,to fully pass the trip or throw-off lever, whichit actuates, before the movable clutch member has reached the limit ofits movement away from its mate or the fixed member.

Another object of my invention is to provide improved means for causingthe movable part or member of the clutch or other detachable connectionbetween the driving shaft and knife-operating mechanism, to continue tomove away from'the other member after they have become fully disengaged,whereby danger of accidental re-engagement will be avoided. I

My improvements also relate to the arrangement of thevarious gears andshafts, and their arrangement with relation to each other and to theframe of the machine, and hence my invention has for its further objectto improve the general arrangement of such gears and shafts, wherebythey may be placed farther under the machine so as to be out of the way,and also render the machine more compact and convenient.

With these ends in view, myinvention consists in certain features ofnovelty inthe construction, combination and arrangement of partshereinafter fully described with reference to the accompanying drawingsand more particularly pointed out in the claims In the said drawings,Figure l is a side elevation of a paper-cutting machine embodyingmyimprovements. Fig. 2 is a detail view of the throw-off mechanism andco-operating parts, partly in section and partly broken away. Fig. 3 isan end elevation. Fig. 4 is an enlarged detail sectional view of theclutch and brake mechanism, taken on the line 4 4, Fig. 5. Fig. 5 is anenlarged detail view, partly in section, of a portion of the throwoffmechanism hereinafter described; and Figs. 6 and 7 are detail viewshereinafter described. I

Like signs of reference. indicate like parts throughout the severalviews.

1 is the main frame, having a table 2, rising from which are the guidestandards 3, in'which latter the knife 4 is mounted and guided as usual,and 5 is the main driving shaft which may derive its motion from anysuitable belt or band, not shown, running over the pillley 6, and whichshaft is provided with a detachable connection with the knife-operatingmechanism.

As shown in the drawings, the driving shaft 5 is mounted transversely ofthe plane of movement of the knife in-brackets or castings 7 which areformed on or suitably secured to the end of the frame 1, and as aconvenient and efiicient form of the said detachable connection betweenthe driving shaft and the knifeoperating mechanism, I have shown andprefer to employ a clutch consisting of two members 8, 9, the former ofwhich is capable of longitudinal movement on the shaft 5 but is causedto rotate therewith by means of a spline 10 in the ordinary manner,while the other member 9 is mounted loosely upon the shaft and issecured to or formed integrally with a pinion 11, which is in permanentengagement with a gear wheel 12 mounted upon a shaft 13 journaled at alower point in the bracket 7 below and parallel with the main drivingshaft 5.

On the shaft 13 with the gear-wheel 12 is mounted and secured a pinion14 which engages with a large gear-wheel 15. This gearwheel 15, insteadof being mounted in bearings arranged at the end of the frame under thedriving shaft, is mounted in a pair of inwardly projecting brackets 16,the bracket on one side of the machine only being shown in Fig. 1, butthe one on the other side may be an exact duplicate thereof exceptingthat it is provided with an elongated bearing 17, as shown in Fig. 3,which affords a firmer and more rigid support for the journal 18, asshown in dotted lines, on that side. The journal or shaft 18, however,does not extend entirely through the wheel into the bearing of thebracket 160 n the other side. The wheel on that side is supported by ajournal 19 which is secured to a counterbalance 20, and thiscounterbalance in turn is rigidly secured to the wheel by means of acrank-pin 21, to which the usual link or connecting arm 22 for operatingthe knife is pivoted.

The movable clutch member 8 may be thrown into and out of engagementwith its mate 9 by means of a horizontal bell-crank lever 23 secured toan upright shaft or pin 24 and having one of its arms provided with anysuitable connection with the member 8,

such as a pin 25 engaging in the peripheral groove 26 formed in suchmember 8, the other arm of the lever 23 being provided with a suitablehandle 27. This lever constitutes a part or member of the stop mechanismor throw-oit before referred to and hereinafter more fully described,and by throwing such lever inward or outward, the machine may be throwninto or out of operation at the will of the operator; but in order thatthe machine may be thrown OK or out of operation automatically when theknife has completed its upward movement, the clutch-member 8 isconnected with and adapted to be shifted by the knife-operatingmechanism. I accomplish this by securing to the lower end of the pin orshaft 21, which may be mounted or journaled in a suitable bracket 28formed on or secured to the frame 1, a horizontal crankarm 29, which inturn is jointed to an upright pivoted lever 30 which constitutes a tripwhose lower end 31 is arranged in the path of and adapted to be struckby the moving lug 32 carried by the wheel 15 of the knife-operatingmechanism, thus causing the crank-arm 29 to oscillate in a horizontalplane and produce a similar oscillation of the bell crank lever 23,whose outer arm carrying the pin 25 imparts the requisite movement tothe clutchmember 8 for disengaging the latter from its mate 9.

The disengaging lug 32 which forms a part of the throw-cit mechanism orstop just described, instead of being a fixed lug as heretofore, is inthe form of an arm pivoted at to a part of the wheel 15 and has its endarranged loosely between two stops 34: between which it plays. As thewheel 15 rotates, the lug 32 will be carried around and will rest uponthe lower one of the stops 34: until its end reaches the end 31 of thetrip 3, which, if the clutch-members are in engagement, will be engagedby the lug 32 and the lug will be forced upward until it bears againstthe upper one of its stops 34, whereuponit will bcgi n to deflect theend 31 of the trip and thus effect the disengagement of theclutch-members through the medium of the connections already described.Inasmuch as a brake, hereinafter described, is employed for arrestingthe further move ment of the knife-operating mechanism after theclutches are disengaged, it stands to reason that the lug 32, if afixture as heretofore, will not, or at least might not, fully pass theend 31 ofthe trip before the movement of the wheel 15 ceases, because assoon as the clutchmembers disengage, the rotation of the wheel 15 isarrested by the brake and such members cannot be disengaged by the lug32 alone if such lug passes the trip before the disengagement of theclutch-members is fully effected; but with a pivoted lug, as shown anddescribed, the parts may be so adjusted that the end 31 of the trip,while it may be opposite the end of the lug when the rotation of thewheel 15 ceases, will nevertheless be entirely from under thelug andwill permit such lug to fall by gravity independently of the wheel 15,until it strikes its lower stop 34, thus leaving the end 31 of the tripfree to move inward toward the wheel 15 when it is desired to againthrow the machine into operation by forcing the handle 27 of the lever23 inward.

WVhile the pivoting of the lug 32 will effectually avoid the hangingthereof on the trip l'IO lever, it does not avoid the accidentalre-engagement of the clutch-members as before described, and in orderthat this also maybe accomplished, and the disengagement of the lug withthe trip at the conclusion of each operation or return movement of theknife.

rendered absolutely certain, I provide the lower arm of the bell-crank23 with an extension 35 having a projection or pin 36 against whichbears a spring-arm 37 secured at 38 to one of the brackets 7 and havingan incline or cam 39 formed thereon near its free end, such inclineterminating in a hook or rest 40 for the pin 36. The location of thisincline or cam 39 with relation to the movement of the lever 23 is suchthat the automatic movement of such lever resulting from the engagementof the lug 32 with the trip 30 will bring the pin 36 to' the inner edgeor end of the incline 39, and as the spring-arm 37 exerts normally aninward pressure against the pin 36, it will be seen that as soon as thepin reaches such point, the incline 39 will act to force the pin farthertoward the extremity of the spring-arm, carrying the lever 23 with itand consequently continuing the movement of the clutch-member 8' awayfrom its mate, and also still further deflecting the end 31 of the tripand allowing the lug '32 to drop to its lower stop 34 if by anypossibility such lug should hang upon the trip. At the instant thisadditional movement of the pin 36 takesplace, a brake-shoe 41 supportedon the inner side of the spring-arm 37 by means of a set-screw 42 isforced against the periphery of the clutch 9 by reason of the springarm37 being permitted to approach the clutch when the pin 36 slides intoits rest or stop at the end of the spring, thus instantly arresting anyfurther rotation of the clutch-member 9 and consequently of theknife-operating mechanism. On the other hand, when the handle 27 isforced inward for causing the clutch-members to again engage, the pin 36will ride along the incline 39 and force the spring-arm 37 outward,thereby withdrawing the brake-shoe 41 from theperiphery of theclutch-member 9 before such member has been re-engaged by the drivingmember 8.

The clutch-member 9 may be held in position on the shaft 5 and inengagement with the gear-wheel 12 by means of a bracket 43 secured by ascrew 44 to the bracket 7 and having a curved plate or portion 45projecting over the teeth of the wheel 11 and being provided with aninwardly turned lip or flange 46 engaging over the outer side of suchteeth and thus preventing the endwise move ment of the wheel andclutch-member toward the movable member 8.

-The horizontal crank-arm 29 is adjustably secured to its stem or shaft24 by means of a set-screw 47 or otherwise, whereby its position withrelation to the lower arm of the lever 23 may be varied in order thatthe end 31 of the trip may be accurately adjusted with relation to thepivoted lug 32, whereby such lug may be caused to throw the trip therequisite distan ce for shifting the clutch-member 8.

The arms of the lever 30. are preferably formed on or secured to ahorizontal sleeve or hub 48, the upper arm 49 of such lever being formedat one end, and the lower arm 31 being formed at the other end of suchhub or sleeve, whereby the upper arm will be in position to be engagedby the end of the crank-arm 29, while the lower one will be at theopposite side of the wheel 15' in position to be engaged by the lug 32.The sleeve or hub 48 is pivoted on a pin or shaft 50, as shown in dottedlines in Fig. 3, secured in a portion of the bracket 7. In order thatthe connecting rod 22 may pass over the end 31 of the lever 30 and thelug 32, the crank-pin 21 is so formed as to hold such connecting rod ata short distance from the face of the wheel 15, as shown in Fig. 3. Theordinary method of connecting the arm 49 of the lever 30 with thecrank-arm 29 would be by ball-and-socket joint, but a much simplor, moreeasily constructed and equally efiicient joint, and which I prefer toemploy, consists of a conical head 49 tapering toward its inner end, asshown in Fig. 7, fitting into a semi-cylindrical cavity or socket 29*formed in the under side of the crank-arm 29, the inner end of the head49* being tapered, as shown, in order to permit the arm 49 to oscillatein a vertical plane, while the arm 29 oscillates on its pivot in ahorizontal plane.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, -is- 1. In a paper cutting machine,the combination with a knife-operating mechanism, a driving shaft havinga detachable connection with said knife'operating mechanism, and athrow-off actuated by said knife-operating mechanism and adapted to movesaid connection out of engagement, of a spring-arm having an incline forgiving said connection a further movement in the same direction, and abrake? shoe secured to said spring-arm and adapted to arrest themovement of the knife-operating mechanism, substantially as set forth.

2. .In a paper cutting machine, the combination with a knife-operatingmechanism, a driving shaft having a detachable connection therewith, anda brake for arresting the movement of said knife-operating mechanism, ofa spring-arm secured to said brake and having an incline, and athrow-offoperated by the knife-operating mechanism for disengaging saiddetachable connection and having a lever provided with a bearing forsaid springarm, substantially as set forth.

3. In a paper cutting machine, the combination with a knife-operatingmechanism and a driving shaft having a detachable connection therewith,of a horizontal hand-lever connected with and adapted to operate saiddetachable connection, a horizontal crank-arm connected to said lever, asecond pivoted lever jointed to said crank-arm, and means for deflectingsaid second lever by the movement of the knife-operating mechanism, forshifting said detachable connection, substantially as set forth,

4. In apaper cutting machine, the combi- IIO nation with aknife-operating mechanism'and a driving shaft having a detachableconnection therewith, of a horizontal hand-lever connected with andadapted to operate said detachable connection, a horizontal crank-armconnected to said lever, a second pivoted lever jointed to saidcrank-arm, means for deflecting said second lever by the movement of theknife-operating mechanism, for shifting said detachable connection, andmeans for imparting a further shift to said detachable connection,substantially as set forth.

5. In a paper cutting machine, the combination with a knife-operatingmechanism, a driving shaft and detachable clutch-members for connectingsaid driving shaft with said knife-operating mechanism, of a pivotedhorizontal bell-crank lever connected to one member of said clutch andhavinga pin or projection, a spring-arm having an incline adapted tobear against said projection and move said lever, a brake-shoe actuatedby said arm for arresting the movement of the knife-operating mechanism,and means for disengaging said clutch-members by the movement of theknife-operating mechanism, substantially as set forth.

6. In a paper cutting machine, the combination with a knife-operatingmechanism, a driving shaft and detachable clutch-members for connectingsaid driving shaft with said knife-operating mechanism, of a pivotedhorizontal bell-crank lever connected to one member of said clutch andhaving a pin or projection, a spring-arm having an incline adapted tobear against said projection and move said lever, a brake-shoe actuatedby said arm for arresting the movement of the knife-operating mechanism,a horizontal crank-arm connected to said bell-crank lever, an uprightpivoted lever jointed to said crank-arm, and an independently movablelug carried by the knife-operating mechanism and adapted to engage oneend of said upright lever, substantially as set forth.

7. In a paper cutting machine, the combination with a knife-operatingmechanism, a pivoted lever, a driving shaft, and a pair ofclutch-members mounted upon said shaft and connected with saidknife-operating mechanism and pivoted lever respectively, of aspringarm,having an incline, arranged lengthwise of said driving shaft, a pin orprojection on said lever against which said spring-arm bears, and abrake-shoe secured to said spring-arm and adapted to arrest the movementof the knife-operating mechanism after said pin or projection passessaid incline, substantially as set forth.

8. In a paper cutting machine, the combination with a knife-operatingmechanism, a pivoted lever, a driving shaft, and a pair ofclutch-members mounted on said shaft and connected with said lever andknife-operating mechanism respectively, of a spring-arm arrangedlengthwise of said driving shaft and having an incline, a pin orprojection on said pivoted lever against which said spring-arm bears, abrake-shoe adapted to bear against one of said clutcbmembers, and meansfor adjustably connecting said brakeshoe and spring-arm together,substantially as set forth.

9. In a paper cutting machine, the combination with a knife-operatingmechanism, a pivoted hand-lever, a driving shaft, and a pair ofclutch-members arranged on said shaft and being connected with saidlever and knife-operating mechanism respectively, of a spring armarranged lengthwise of said shaft and having an incline, a pin orprojection on said lever against which said incline is adapted to bear,a brake-shoe carried by said spring arm for arresting the movement ofsaid knife-operating mechanism, an independently movable lug carried bythe knife-operating mechanism, and a trip connected with the member ofsaid clutch with which "said hand-lever is connected and adapted to beimpinged by said pivoted lug, substantially as set forth.

10. In a paper cutting machine, the combination with a knife-operatingmechanism and a driving shaft having a pair of clutch-memhers thereon,with one of which said knifeoperating mechanism is connected, of ahorizontal bell-crank lever connected with the other one of saidclutch-members and having the extension 35 provided with a pin, aspringarm bearing upon said pin, a brake-shoe carried by said arm andarranged to arrest the movement of the knife-operating mechanism,

a horizontal crank-arm secured to said lever,

an upright pivoted lever jointed to said crankarm, and an independentlymovable lug carried by the knife-operating mechanism and adapted todeflect said upright lever, substantially as set forth.

11. In apaper cutting machine, the combination with a knife-operatingmechanism having the gear-wheel 15, a driving shaft, a pair ofclutch-members on said shaft with one of which said gear-wheel isgeared, and a lug carried by said gear-wheel, of the upright pin orshaft 24, a lever 23 on shaft 24: connected with the other one of saidclutch-members, a horizontal crank-arm on said pin or shaft, the le ver30 having an upright arm jointed to said crank-arm, and a horizontalsleeve or hub projecting across said gear-wheel and having a downwardlyprojecting arm adapted to be impinged by said lug, a spring-arm having abearing against said lever 23, and a brakeshoe operated by saidspring-arm to arrest the movement of said knife-operating mechanism,substantially as set forth.

12. In a paper cutting machine, the combination of the crank-arm 29having a semi-cylindrical cavity therein, a pivoted lever having aconical head engaging in said cavity, a driving shaft, a knife-operatingmechanism, a detachable connection between said driving shaft andknife-operating mechanism connected with said arm, and means fordeflecting said lever, substantially as set forth.

13. In a paper cutting machine, the combi- IIO nation with aknife-operatin g mechanism and a driving shaft, of the bracket 28,anupright pin j ournaled therein, a horizontal bell-crank lever secured tosaid pin, a pair of clutchmembers mounted upon said driving shaft andbeing connected respectively with said knife-operating mechanism andhorizontal le-- ings in both sides thereof, the gear-wheel 15 journaledon one side in one of said bearings, the journal 19 journaled in theother of said bearings, a wristpin secured to said wheel and beingconnected with said journal 19, the knife, a link pivoted on saidwrist-pin and connected to said knife, the brackets 7 the shaft 13journaled in said brackets, a pinion on said shaft engaging saidgear-wheel 15, the driving shaft journaled in said brackets above saidshaft 13, a clutch-member on said driving shaft, the gear-wheel 12 onsaid shaft 13, and a pinion connecting said clutch-member with saidwheel 12, a second clutch-member on said driving shaft, and means forthrowing said clutch-members into and out oFengagement, substantially asset forth.

ROBERT MIEHLE. Witnesses:

F. A. HOPKINS, EDNA B. J OHNSON.

